U.S. patent application number 14/320004 was filed with the patent office on 2015-01-01 for method and apparatus for handling a configuration for measurement in a wireless communication system.
The applicant listed for this patent is INNOVATIVE SONIC CORPORATION. Invention is credited to Yu-Hsuan Guo.
Application Number | 20150003266 14/320004 |
Document ID | / |
Family ID | 51062696 |
Filed Date | 2015-01-01 |
United States Patent
Application |
20150003266 |
Kind Code |
A1 |
Guo; Yu-Hsuan |
January 1, 2015 |
METHOD AND APPARATUS FOR HANDLING A CONFIGURATION FOR MEASUREMENT
IN A WIRELESS COMMUNICATION SYSTEM
Abstract
Methods and apparatuses are disclosed for handling a
configuration for measurement by a User Equipment (UE) in a
wireless communication system. The method includes connecting to a
serving cell. The method further includes receiving a first
signaling that includes a measurement configuration. The method
also includes applying the measurement configuration upon receiving
a second signaling indicating to start performing measurement.
Inventors: |
Guo; Yu-Hsuan; (Taipei City,
TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
INNOVATIVE SONIC CORPORATION |
Taipei City |
|
TW |
|
|
Family ID: |
51062696 |
Appl. No.: |
14/320004 |
Filed: |
June 30, 2014 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
61841553 |
Jul 1, 2013 |
|
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Current U.S.
Class: |
370/252 |
Current CPC
Class: |
H04L 67/02 20130101;
G06Q 30/0222 20130101; G06Q 20/10 20130101; H04W 36/0088 20130101;
G06F 3/04842 20130101; H04W 52/365 20130101; H04L 67/42 20130101;
H04L 67/10 20130101; G06Q 20/387 20130101; G06Q 30/0277 20130101;
G06Q 30/0239 20130101; H04W 72/0413 20130101; G06Q 30/0273
20130101; H04W 72/02 20130101; H04W 24/10 20130101 |
Class at
Publication: |
370/252 |
International
Class: |
H04W 36/00 20060101
H04W036/00; H04W 72/02 20060101 H04W072/02; H04W 24/10 20060101
H04W024/10 |
Claims
1. A method for handling a configuration for measurement by a User
Equipment (UE) in a wireless communication system, the method
comprising: connecting to a serving cell; receiving a first
signaling, wherein the first signaling includes a measurement
configuration; and applying the measurement configuration upon
receiving a second signaling indicating to start performing
measurement.
2. The method of claim 1, further comprising: stopping the
application of the measurement configuration upon receiving a third
signaling, wherein the third signaling indicates to stop performing
the measurement.
3. The method of claim 1, wherein the UE does not leave Radio
Resource Control Connected (RRC_CONNECTED) due to the second
signaling.
4. The method of claim 1, wherein the first signaling is a Radio
Resource Control (RRC) connection reconfiguration message.
5. The method of claim 1, wherein the measurement configuration
includes MeasConfig or measuring a serving cell, intra-frequency
cell, inter-frequency cell, or inter-RAT cell.
6. The method of claim 1, wherein the measurement configuration
includes reporting measured results based on an event or reporting
the measured results periodically.
7. The method of claim 1, wherein the second signaling is
transmitting to multiple UEs.
8. The method of claim 1, wherein the second signaling is a paging
message, Physical Downlink Control Channel (PDCCH) signaling,
Medium Access Control (MAC) control element, or system
information.
9. A method for handling a configuration for measurement by a User
Equipment (UE) in a wireless communication system, the method
comprising: camping on a serving cell; receiving a first signaling,
wherein the first signaling includes a cell reselection
configuration; and applying the cell reselection configuration upon
receiving a second signaling indicating to start performing cell
reselection evaluation.
10. The method of claim 9, further comprising: stopping the
application of the cell reselection configuration upon receiving a
third signaling, wherein the third signaling indicates to stop
performing the cell reselection evaluation.
11. The method of claim 9, wherein the second signaling is
transmitting to multiple UEs.
12. The method of claim 9, wherein the second signaling is a paging
message, Physical Downlink Control Channel (PDCCH) signaling,
Medium Access Control (MAC) control element, or system
information.
13. The method of claim 9, wherein the first signaling is system
information.
14. The method of claim 9, wherein the cell reselection
configuration includes SystemInformationBlockType3,
SystemInformationBlockType4, SystemInfomationBlockType5,
SystemInformationBlockType6, SystemInformationBlockType 7, or
SystemInformationBlockType8.
15. The method of claim 9, wherein the cell reselection
configuration includes measuring a cell the UE camps on, an
intra-frequency cell, inter-frequency cell, or inter-RAT cell.
16. The method of claim 9, wherein the UE is in Radio Resource
Control Idle (RRC_IDLE).
17. A communication device for handling a configuration for
measurement in a wireless communication system, the communication
device comprising: a control circuit; a processor installed in the
control circuit; a memory installed in the control circuit and
operatively coupled to the processor; wherein the processor is
configured to execute a program code stored in memory to handle a
configuration for measurement in the wireless communication system
by: connecting to a serving cell; receiving a first signaling,
wherein the first signaling includes a measurement configuration;
and applying the measurement configuration upon receiving a second
signaling indicating to start performing measurement.
18. The communication device of claim 17, further comprising:
stopping the application of the measurement configuration upon
receiving a third signaling, wherein the third signaling indicates
to stop performing the measurement.
19. The communication device of claim 17, wherein the first
signaling is a Radio Resource Control (RRC) connection
reconfiguration message.
20. The communication device of claim 17, wherein the second
signaling is a paging message, Physical Downlink Control Channel
(PDCCH) signaling, Medium Access Control (MAC) control element, or
system information.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] The present Application claims the benefit of U.S.
Provisional Patent Application Ser. No. 61/841,553 filed on Jul. 1,
2013, the entire disclosure of which is incorporated herein by
reference.
FIELD
[0002] This disclosure generally relates to wireless communication
networks, and more particularly, to methods and apparatuses for
handling a configuration for measurement in a wireless
communication system.
BACKGROUND
[0003] With the rapid rise in demand for communication of large
amounts of data to and from mobile communication devices,
traditional mobile voice communication networks are evolving into
networks that communicate with Internet Protocol (IP) data packets.
Such IP data packet communication can provide users of mobile
communication devices with voice over IP, multimedia, multicast and
on-demand communication services.
[0004] An exemplary network structure for which standardization is
currently taking place is an Evolved Universal Terrestrial Radio
Access Network (E-UTRAN). The E-UTRAN system can provide high data
throughput in order to realize the above-noted voice over IP and
multimedia services. The E-UTRAN system's standardization work is
currently being performed by the 3GPP standards organization.
Accordingly, changes to the current body of 3GPP standard are
currently being submitted and considered to evolve and finalize the
3GPP standard.
SUMMARY
[0005] Methods and apparatuses are disclosed for handling a
configuration for measurement by a User Equipment (UE) in a
wireless communication system. The method includes connecting to a
serving cell. The method further includes receiving a first
signaling that includes a measurement configuration. The method
also includes applying the measurement configuration upon receiving
a second signaling indicating to start performing measurement.
BRIEF DESCRIPTION OF THE DRAWINGS
[0006] FIG. 1 shows a diagram of a wireless communication system
according to one exemplary embodiment.
[0007] FIG. 2 is a block diagram of a transmitter system (also
known as access network) and a receiver system (also known as user
equipment or UE) according to one exemplary embodiment.
[0008] FIG. 3 is a functional block diagram of a communication
system according to one exemplary embodiment.
[0009] FIG. 4 is a functional block diagram of the program code of
FIG. 3 according to one exemplary embodiment.
[0010] FIG. 5 is a diagram of a reference scenario for a high speed
train as shown in 3GPP RP-130896, "3GPP TR 36.836 V12.0.0 Mobile
Relay for E-UTRA".
[0011] FIG. 6 is a flow diagram of one exemplary method.
[0012] FIG. 7 is a flow diagram of one exemplary method.
[0013] FIG. 8 is a flow diagram of one exemplary method.
[0014] FIG. 9 is a flow diagram of one exemplary method.
DETAILED DESCRIPTION
[0015] The exemplary wireless communication systems and devices
described below employ a wireless communication system, supporting
a broadcast service. Wireless communication systems are widely
deployed to provide various types of communication such as voice,
data, and so on. These systems may be based on code division
multiple access (CDMA), time division multiple access (TDMA),
orthogonal frequency division multiple access (OFDMA), 3GPP LTE
(Long Term Evolution) wireless access, 3GPP LTE-A or LTE-Advanced
(Long Term Evolution Advanced), 3GPP2 UMB (Ultra Mobile Broadband),
WiMax, or some other modulation techniques.
[0016] In particular, the exemplary wireless communication systems
devices described below may be designed to support one or more
standards such as the standard offered by a consortium named "3rd
Generation Partnership Project" referred to herein as 3GPP,
including Document Nos. TS 36.300 V11.5.0, entitled "E-UTRA and
E-UTRAN, Overall description, Stage 2"; TS 36.331 V11.3.0, entitled
"E-UTRA RRC protocol specification"; RP-122010, entitled "Update of
SID on Mobile Relay for E-UTRA"; RP-130896, entitled "3GPP TR
36.836 V12.0.0 Mobile Relay for E-UTRA"; TS 36.304 V11.3.0,
entitled "E-UTRA UE procedures in idle mode"; and TS 36.321
V11.2.0, entitled "E-UTRA MAC protocol specification". The
standards and documents listed above are hereby expressly
incorporated by reference in their entirety.
[0017] FIG. 1 shows a multiple access wireless communication system
according to one embodiment of the invention. An access network 100
(AN) includes multiple antenna groups, one including 104 and 106,
another including 108 and 110, and an additional including 112 and
114. In FIG. 1, only two antennas are shown for each antenna group,
however, more or fewer antennas may be utilized for each antenna
group. Access terminal 116 (AT) is in communication with antennas
112 and 114, where antennas 112 and 114 transmit information to
access terminal 116 over forward link 120 and receive information
from access terminal 116 over reverse link 118. Access terminal
(AT) 122 is in communication with antennas 106 and 108, where
antennas 106 and 108 transmit information to access terminal (AT)
122 over forward link 126 and receive information from access
terminal (AT) 122 over reverse link 124. In a FDD system,
communication links 118, 120, 124 and 126 may use different
frequency for communication. For example, forward link 120 may use
a different frequency then that used by reverse link 118.
[0018] Each group of antennas and/or the area in which they are
designed to communicate is often referred to as a sector of the
access network. In the embodiment, antenna groups each are designed
to communicate to access terminals in a sector of the areas covered
by access network 100.
[0019] In communication over forward links 120 and 126, the
transmitting antennas of access network 100 may utilize beamforming
in order to improve the signal-to-noise ratio of forward links for
the different access terminals 116 and 122. Also, an access network
using beamforming to transmit to access terminals scattered
randomly through its coverage causes less interference to access
terminals in neighboring cells than an access network transmitting
through a single antenna to all its access terminals.
[0020] An access network (AN) may be a fixed station or base
station used for communicating with the terminals and may also be
referred to as an access point, a Node B, a base station, an
enhanced base station, an evolved Node B (eNB), or some other
terminology. An access terminal (AT) may also be called user
equipment (UE), a wireless communication device, terminal, access
terminal or some other terminology.
[0021] FIG. 2 is a simplified block diagram of an embodiment of a
transmitter system 210 (also known as the access network) and a
receiver system 250 (also known as access terminal (AT) or user
equipment (UE)) in a MIMO system 200. At the transmitter system
210, traffic data for a number of data streams is provided from a
data source 212 to a transmit (TX) data processor 214.
[0022] In one embodiment, each data stream is transmitted over a
respective transmit antenna. TX data processor 214 formats, codes,
and interleaves the traffic data for each data stream based on a
particular coding scheme selected for that data stream to provide
coded data.
[0023] The coded data for each data stream may be multiplexed with
pilot data using OFDM techniques. The pilot data is typically a
known data pattern that is processed in a known manner and may be
used at the receiver system to estimate the channel response. The
multiplexed pilot and coded data for each data stream is then
modulated (i.e., symbol mapped) based on a particular modulation
scheme (e.g., BPSK, QPSK, M-PSK, or M-QAM) selected for that data
stream to provide modulation symbols. The data rate, coding, and
modulation for each data stream may be determined by instructions
performed by processor 230.
[0024] The modulation symbols for all data streams are then
provided to a TX MIMO processor 220, which may further process the
modulation symbols (e.g., for OFDM). TX MIMO processor 220 then
provides N.sub.T modulation symbol streams to N.sub.T transmitters
(TMTR) 222a through 222t. In certain embodiments, TX MIMO processor
220 applies beamforming weights to the symbols of the data streams
and to the antenna from which the symbol is being transmitted.
[0025] Each transmitter 222 receives and processes a respective
symbol stream to provide one or more analog signals, and further
conditions (e.g., amplifies, filters, and upconverts) the analog
signals to provide a modulated signal suitable for transmission
over the MIMO channel. N.sub.T modulated signals from transmitters
222a through 222t are then transmitted from N.sub.T antennas 224a
through 224t, respectively.
[0026] At receiver system 250, the transmitted modulated signals
are received by N.sub.R antennas 252a through 252r and the received
signal from each antenna 252 is provided to a respective receiver
(RCVR) 254a through 254r. Each receiver 254 conditions (e.g.,
filters, amplifies, and downconverts) a respective received signal,
digitizes the conditioned signal to provide samples, and further
processes the samples to provide a corresponding "received" symbol
stream.
[0027] An RX data processor 260 then receives and processes the
N.sub.R received symbol streams from N.sub.R receivers 254 based on
a particular receiver processing technique to provide N.sub.T
"detected" symbol streams. The RX data processor 260 then
demodulates, deinterleaves, and decodes each detected symbol stream
to recover the traffic data for the data stream. The processing by
RX data processor 260 is complementary to that performed by TX MIMO
processor 220 and TX data processor 214 at transmitter system
210.
[0028] A processor 270 periodically determines which pre-coding
matrix to use (discussed below). Processor 270 formulates a reverse
link message comprising a matrix index portion and a rank value
portion.
[0029] The reverse link message may comprise various types of
information regarding the communication link and/or the received
data stream. The reverse link message is then processed by a TX
data processor 238, which also receives traffic data for a number
of data streams from a data source 236, modulated by a modulator
280, conditioned by transmitters 254a through 254r, and transmitted
back to transmitter system 210.
[0030] At transmitter system 210, the modulated signals from
receiver system 250 are received by antennas 224, conditioned by
receivers 222, demodulated by a demodulator 240, and processed by a
RX data processor 242 to extract the reserve link message
transmitted by the receiver system 250. Processor 230 then
determines which pre-coding matrix to use for determining the
beamforming weights then processes the extracted message.
[0031] Turning to FIG. 3, this figure shows an alternative
simplified functional block diagram of a communication device
according to one embodiment of the invention. As shown in FIG. 3,
the communication device 300 in a wireless communication system can
be utilized for realizing the UEs (or ATs) 116 and 122 in FIG. 1,
and the wireless communications system is preferably the LTE
system. The communication device 300 may include an input device
302, an output device 304, a control circuit 306, a central
processing unit (CPU) 308, a memory 310, a program code 312, and a
transceiver 314. The control circuit 306 executes the program code
312 in the memory 310 through the CPU 308, thereby controlling an
operation of the communications device 300. The communications
device 300 can receive signals input by a user through the input
device 302, such as a keyboard or keypad, and can output images and
sounds through the output device 304, such as a monitor or
speakers. The transceiver 314 is used to receive and transmit
wireless signals, delivering received signals to the control
circuit 306, and outputting signals generated by the control
circuit 306 wirelessly.
[0032] FIG. 4 is a simplified block diagram of the program code 312
shown in FIG. 3 in accordance with one embodiment of the invention.
In this embodiment, the program code 312 includes an application
layer 400, a Layer 3 portion 402, and a Layer 2 portion 404, and is
coupled to a Layer 1 portion 406. The Layer 3 portion 402 generally
performs radio resource control. The Layer 2 portion 404 generally
performs link control. The Layer 1 portion 406 generally performs
physical connections.
[0033] For LTE or LTE-A systems, the Layer 2 portion may include a
Radio Link Control (RLC) layer and a Medium Access Control (MAC)
layer. The Layer 3 portion may include a Radio Resource Control
(RRC) layer.
[0034] Currently, LTE only supports stationary relay, the details
of which are described in 3GPP TS 36.300 V11.5.0 and TS 36.331
V11.3.0. As for mobile relay, the study item on mobile relay for
E-UTRA (RP-122010) is terminated and a corresponding work item may
be initiated in the next RAN plenary meeting. The latest technical
report corresponding to the study item is provided in RP-130896. In
part, RP-130896 describes the target scenario to study as
follows:
4.1 Scenario
[0035] High speed public transportation is being deployed worldwide
at an increased pace. Hence, providing multiple services of good
quality to users on high speed vehicles is important yet more
challenging than typical mobile wireless environments.
[0036] The mobile relay SI focuses on the high speed train scenario
as the target deployment scenario to study. High speed train
scenario can be characterized as: [0037] The trains operated with
high speed, e.g. 350 km/h [0038] Known trajectory [0039] High
penetration loss of the radio signal through the well shield
carriages [0040] UEs on the trains are stationary or move at
pedestrian speed w.r.t. relay nodes
[0041] A reference scenario for high speed train is depicted in
FIG. 5.
[0042] The TGV Eurostar in Europe is 393 m long, moves at speed
reaching 300 km/h. The Shinkansen in Japan has similar
characteristics, with 480 m long, 300 km/h of commercial speed. The
high speed train in China is 432 m long moving at speed reaching
350 km/h. Due to fast moving and well shield carriage, the network
in high speed train scenario faces severe Doppler frequency shift
and high penetration loss, reduced handover success rate and
increased power consumption of UEs.
[0043] To improve the coverage of the train deployment, access
devices can be mounted on the high speed train, providing a
wireless backhaul connection via the eNBs along the railway by
outer antenna e.g. installed on top of the train, and wireless
connectivity to the UEs inside carriages by inner antenna installed
inside.
[0044] Also, RP-130896 describes mobile relay as quoted below:
[0045] 5.2 Mobile relay
[0046] The mobile relays are base stations/access points mounted on
the high speed trains. The mobile relay is connected wirelessly to
Donor eNB (DeNB) via the Un radio interface. The mobile relay
provides wireless connectivity service to end users inside the
vehicle. In addition to the eNB functionality, mobile relays
support a subset of the UE functionality to connect to the
DeNB.
[0047] 5.2.1 Functions
[0048] From a specification point of view, functionalities defined
for fixed relays in Rel-10 also apply to mobile relays, unless
explicitly specified. Due to the mobility of the Mobile Relay,
further enhancements or new procedures may be required in order to
support all existing network functionalities.
[0049] Mobile relays may support multi-RAT functionalities. This
means an LTE Un provides the backhaul link, while different air
interface technologies, e.g. LTE/3G/2G/WiFi, may be supported on
the access link.
[0050] Mobile relays continue to provide uninterrupted connectivity
for the user plane and control plane of the served UEs to their
respective core network nodes, when the Un connection is changed to
different DeNBs as the mobile relay moves through the coverage of
the network.
[0051] Additionally, possible mobile relay architectures are also
provided in RP-130896.
[0052] Since the target scenario of mobile relay is high speed
train scenario, passengers would not get off the train until
arriving train stations. In other words, UEs in the train would not
leave the coverage of the mobile relay until arriving train
stations. And the cell of the mobile relay may be the best cell for
the UEs when the train is moving. Accordingly, when the train is in
motion, it would appear that performing measurement for mobility
purpose, e.g. handover or cell reselection, by the UEs in the train
would be unnecessary and would result in unnecessary UE power
consumption.
[0053] For a UE in RRC_CONNECTED, a UE in a train may need to
handover only when the train arrives at a train station. A mobile
relay could configure UEs connecting to the mobile relay with a
measurement configuration (as disclosed in 3GPP TS 36.331 V11.3.0)
when the mobile relay stops or almost stops moving. For example,
configuring the measurement configuration may occur when the speed
of the mobile relay is less than a threshold. Alternatively,
configuring the measurement configuration may occur when the mobile
relay arrives at or is close to a specific location, e.g., a train
station.
[0054] Then, the mobile relay could release the measurement
configuration of the UEs when the mobile relay starts moving. For
example, the release of the measurement configuration may occur
when the speed of the mobile relay is larger than a threshold.
Alternatively, the release of the measurement configuration may
occur when the mobile relay departs from or is far from a specific
location, e.g., the train station.
[0055] However, the methods mentioned above would result in a large
amount of signaling, e.g., RRC connection reconfiguration
procedures (as disclosed in 3GPP TS 36.331 V11.3.0), within a short
period when the mobile relay stops or almost stops moving. The
large amount of signaling may be attributable to the mobile relay
not knowing which UE may be leaving the coverage of the mobile
relay. So, all UEs connecting to the mobile relay need to be
configured with a measurement configuration to help the mobile
relay make handover decisions. However, configuring the UEs with
measurement configuration too early would also result in too much
power consumption.
[0056] Hence, alternative methods are proposed and contemplated
herein. In one embodiment, a signaling is used to indicate to a UE
to start or stop performing a measurement configuration. The
signaling can be a broadcast signaling such as, but not limited to,
system information (as disclosed in 3GPP TS 36.331 V.11.3.0), a
paging message (as disclosed in 3GPP TS 36.331 V.11.3.0), a PDCCH
signaling, or a MAC control element (as disclosed in 3GPP TS 36.321
V.11.2.0). The measurement is used to measure a serving cell, an
intra-frequency cell, an inter-frequency cell, or an inter-RAT
cell. The signaling may further indicate a time period to perform
or not perform the measurement. Alternatively, a signaling
providing a measurement configuration may include an indication.
The indication is used to indicate to a UE whether to apply the
measurement configuration.
[0057] For a UE in RRC_IDLE, the UE in a train may need cell
reselection only when the train arrives at a train station. A
mobile relay could broadcast system information for cell
reselection (as disclosed in 3GPP TS 36.331 V11.3.0) when the
mobile relay stops or almost stops moving. The system information
that may be broadcasted includes, but is not limited to,
SystemInformationBlockType3, SystemInformationBlockType4,
SystemInformationBlockType5, SystemInformationBlockType6,
SystemInformationBlockType7, and/or SystemInformationBlockType8.
This system information may be broadcasted when the speed of the
mobile relay is less than a predetermined threshold. Alternatively,
the system information may be broadcasted when the mobile relay
arrives at or is close to a specific location, e.g. a train
station.
[0058] The mobile relay could stop broadcasting system information
for cell reselection when the mobile relay starts moving. The
triggering event for stopping the broadcast of the system
information may be the speed of the mobile relay being larger than
a threshold. Alternatively, the triggering event to stop the
broadcast of the system information could be a predetermined
distance of the mobile relay and a specific location, e.g. a train
station.
[0059] However, the UE needs a period of time to acquire the new
system information for cell reselection such as, but not limited
to, wait for paging occasion (as disclosed in 3GPP TS 36.304
V11.3.0), BCCH modification period (as disclosed in 3GPP TS
36.331V11.3.0), system information scheduling (as disclosed in 3GPP
TS 36.331 V11.3.0), or the like. Moreover, UEs in RRC_CONNECTED
would also be affected, e.g. consume additional power, as a result
of the reception of a paging message indicating system information
change.
[0060] Hence, alternative methods are proposed and contemplated
herein. In one embodiment, a signaling is used to indicate to a UE
to start or stop performing cell reselection evaluation. The
signaling can be a broadcast signaling such as, but not limited to,
a paging message, a PDCCH signaling, or a MAC control element. The
cell reselection evaluation would measure an intra-frequency cell,
an inter-frequency cell, or an inter-RAT frequency to decide
whether to reselect another cell to camp on. The signaling may
further indicate a time period to perform or not perform the cell
reselection evaluation. Alternatively, a signaling providing cell
reselection configuration may include an indication. The indication
is used to indicate to a UE whether to apply the cell reselection
configuration to perform cell reselection evaluation.
[0061] In one exemplary method, a UE connects to a serving cell.
The UE receives a first signaling that includes a measurement
configuration. The measurement configuration is applied by the UE
upon the receipt of a second signaling indicating to start
performing measurement. In another method, the UE stops applying
the measurement configuration upon a third signaling indicating to
stop performing measurement is received. In these methods, the UE
does not leave RRC_CONNECTED (as disclosed in 3GPP TS 36.331
V11.3.0) due to the second signaling or the third signaling.
[0062] In another exemplary method, a UE connects to a serving
cell. The UE receives a first signaling that includes a measurement
configuration. The first signaling also includes an indication
whether the measurement configuration should be applied by the UE.
In one embodiment, the presence of the indication with the first
signaling indicates that the measurement configuration should not
be applied, and the absence of the indication with the first
signaling indicates that the measurement configuration should be
applied upon the reception of the first signaling. Alternatively,
in another embodiment, the presence of the indication with the
first signaling indicates that the measurement configuration should
be applied upon the reception of the first signaling, and the
absence of the indication with the first signaling indicates that
the measurement configuration should not be applied.
[0063] In another exemplary method, a network node sends a first
signaling that includes a measurement configuration to a UE. The
network node also sends a second signaling to indicate to the UE to
apply the measurement configuration. In another method, a third
signaling is sent to the UE to indicate to the UE to stop applying
the measurement configuration. In these methods, the UE does not
leave RRC_CONNECTED due to the second signaling or the third
signaling.
[0064] In another method, a network node sends a first signaling
that includes a measurement configuration to a UE. The first
signaling also includes an indication whether the measurement
configuration should be applied by the UE. In one embodiment, the
presence of the indication with the first signaling indicates that
the measurement configuration should not be applied, and the
absence of the indication with the first signaling indicates that
the measurement configuration should be applied. Alternatively, in
another embodiment, the presence of the indication with the first
signaling indicates that the measurement configuration should be
applied, and the absence of the indication with the first signaling
indicates that the measurement configuration should not be
applied.
[0065] In the various methods described above, the first signaling
may be dedicated to the UE. In the various methods described above,
the first signaling may be a RRC connection reconfiguration
message. In the various methods described above, the measurement
configuration may include a MeasConfig (as disclosed in 3GPP TS
36.331 V11.3.0). In the various methods described above, the
measurement configuration may include measuring a serving cell,
intra-frequency cell, inter-frequency cell, or inter-RAT cell. The
inter-RAT may be Universal Terrestrial Radio Access (UTRA), Code
Division Multiple Access 2000 (CDMA2000), or GSM/EDGE Radio Access
Network (GERAN). In the various methods described above, the
measurement configuration includes reporting measurement results
periodically or based on an event.
[0066] In another exemplary method, a UE camps on a cell. The UE
receives a first signaling that includes a cell reselection
configuration. The cell reselection configuration is applied by the
UE upon the receipt of a second signaling indicating to start
performing cell reselection evaluation. In another method, the UE
stops applying the cell reselection configuration upon a third
signaling indicating to stop performing cell reselection evaluation
is received.
[0067] In another exemplary method, a network node sends a first
signaling that includes a cell reselection configuration to a UE.
The network node also sends a second signaling to indicate to the
UE to apply the cell reselection configuration. In another method,
a third signaling is sent to the UE to indicate to the UE to stop
applying the cell reselection configuration.
[0068] In the various methods described above, the second signaling
may be transmitted 6to multiple UEs, for example, by broadcast or
multicast. In the various methods described above, the second
signaling may be system information, a paging message, a PDCCH
signaling, or a MAC control element. In the various methods
described above, the second signaling does not affect other UE
configurations. In the various methods described above, the second
signaling includes a field, e.g., 1 bit, that is used as the
indication for an action, e.g., start performing the measurement.
In the various methods described above, the second signaling
includes a time period for the indicated action, e.g., applying the
measurement configuration for three minutes.
[0069] In another exemplary method, a UE camps on a cell. The UE
receives a first signaling that includes a cell reselection
configuration. The first signaling also includes an indication
whether the cell reselection configuration should be applied by the
UE. In one embodiment, the presence of the indication with the
first signaling indicates that the cell reselection configuration
should not be applied, and the absence of the indication with the
first signaling indicates that the cell reselection configuration
should be applied upon the reception of the first signaling.
Alternatively, in another embodiment, the presence of the
indication with the first signaling indicates that the cell
reselection configuration should be applied upon the reception of
the first signaling, and the absence of the indication with the
first signaling indicates that the cell reselection configuration
should not be applied.
[0070] In another exemplary method, a network node sends a
signaling that includes cell reselection configuration and an
indication to a UE. The indication is used to indicate to the UE to
not apply the cell reselection configuration.
[0071] In another exemplary method, a UE camps on a cell. The UE
acquires scheduling information for system information if the UE
receives a paging message including a cell reselection
notification. The UE acquires a first signaling that includes cell
reselection configuration if the scheduling information indicates
that the first signaling is present, wherein the paging message
does not include a system information change notification.
[0072] In another exemplary method, a network node sends a paging
message including a cell reselection notification to a UE to
indicate to the UE to acquire a first signaling that includes a
cell reselection configuration, wherein the paging message does not
include a system information change notification.
[0073] In the various methods described above, the system
information change notification is SystemInfoModification (as
disclosed in 3GPP TS 36.331 V11.3.0), SystemInformationBlockType1
(as disclosed in 3GPP TS 36.331 V11.3.0), or SchedulingInfoList (as
disclosed in 3GPP TS 36.331 V11.3.0). In the various methods
described above, a value tag for system information, e.g.,
systemInfoValueTag (as disclosed in 3GPP TS 36.331 V11.3.0), is not
changed due to a transmission of the paging message including the
cell reselection notification. In the various methods described
above, the first signaling may be system information. In the
various methods described above, the cell reselection configuration
may include SystemInformationBlockType3,
SystemInformationBlockType4, SystemInformationBlockType5,
SystemInformationBlockType6, SystemInformationBlockType7, or
SystemInformationBlockType8 (as disclosed in 3GPP TS 36.331
V11.3.0). In the various methods described above, the cell
reselection configuration includes measuring a cell the UE camps
on, an intra-frequency cell, inter-frequency cell, or an inter-RAT
frequency (e.g., UTRA, CDMA2000, or GERAN). In the various methods
described above, the cell reselection configuration includes a
threshold used to decide whether to reselect another cell. In the
various methods described above, the UE is in RRC_IDLE (as
disclosed in 3GPP TS 36.331 V11.3.0).
[0074] FIG. 6 illustrates a flow diagram of one exemplary method.
The method includes the following steps: Step 600 Start; Step 602
Connect to serving cell; Step 604 Receive a RRC connection
reconfiguration message including measurement configuration; Step
606 Apply the measurement configuration upon receiving a paging
message with an indication indicating to start performing
measurement; and Step 608 Return.
[0075] FIG. 7 illustrates a flow diagram of one exemplary method.
The method includes the following steps: Step 700 Start; Step 702
Connect to serving cell; Step 704 Receive a RRC connection
reconfiguration message including measurement configuration; Step
706 Stop applying the measurement configuration upon receiving a
paging message with an indication indicating to stop performing
measurement; and Step 708 Return.
[0076] FIG. 8 illustrates a flow diagram of one exemplary method.
The method includes the following steps: Step 800 Start; Step 802
Connect to serving cell; Step 804 Receive a RRC connection
reconfiguration message including measurement configuration; Step
806 Apply the measurement configuration upon receiving the RRC
connection reconfiguration message if the RRC connection
reconfiguration message does not include an indication indicating
not applying the measurement configuration and not applying the
measurement configuration if the RRC configuration reconfiguration
message includes the indication; and Step 808 Return.
[0077] FIG. 9 illustrates a flow diagram of one exemplary method.
The method includes the following steps: Step 900 Start; Step 902
Camp on a cell; Step 904 Acquire SystemInformationBlockType1 if
receiving a paging message including a cell reselection
notification but not a system information change notification; Step
906 Acquire SystemInformationBlockType3 if the
SystemInformationBlockType1 indicates that the
SystemInformationBlockType3 is present; and Step 908 Return.
[0078] Referring back to FIGS. 3 and 4, the device 300 includes a
program code 312 stored in memory 310. In one embodiment, the CPU
308 could execute program code 312 to execute one or more of the
following: (i) connecting to a serving cell; (ii) receiving a first
signaling, wherein the first signaling includes a measurement
configuration; (iii) applying the measurement configuration upon
receiving a second signaling indicating to start performing the
measurement configuration.
[0079] In addition, the CPU 308 can execute the program code 312 to
perform all of the above-described actions and steps or others
described herein.
[0080] With above methods or embodiments, unnecessary power
consumption for measurement and/or cell reselection evaluation can
be prevented efficiently.
[0081] Various aspects of the disclosure have been described above.
It should be apparent that the teachings herein may be embodied in
a wide variety of forms and that any specific structure, function,
or both being disclosed herein is merely representative. Based on
the teachings herein one skilled in the art should appreciate that
an aspect disclosed herein may be implemented independently of any
other aspects and that two or more of these aspects may be combined
in various ways. For example, an apparatus may be implemented or a
method may be practiced using any number of the aspects set forth
herein. In addition, such an apparatus may be implemented or such a
method may be practiced using other structure, functionality, or
structure and functionality in addition to or other than one or
more of the aspects set forth herein. As an example of some of the
above concepts, in some aspects concurrent channels may be
established based on pulse repetition frequencies. In some aspects
concurrent channels may be established based on pulse position or
offsets. In some aspects concurrent channels may be established
based on time hopping sequences. In some aspects concurrent
channels may be established based on pulse repetition frequencies,
pulse positions or offsets, and time hopping sequences.
[0082] Those of skill in the art would understand that information
and signals may be represented using any of a variety of different
technologies and techniques. For example, data, instructions,
commands, information, signals, bits, symbols, and chips that may
be referenced throughout the above description may be represented
by voltages, currents, electromagnetic waves, magnetic fields or
particles, optical fields or particles, or any combination
thereof.
[0083] Those of skill would further appreciate that the various
illustrative logical blocks, modules, processors, means, circuits,
and algorithm steps described in connection with the aspects
disclosed herein may be implemented as electronic hardware (e.g., a
digital implementation, an analog implementation, or a combination
of the two, which may be designed using source coding or some other
technique), various forms of program or design code incorporating
instructions (which may be referred to herein, for convenience, as
"software" or a "software module"), or combinations of both. To
clearly illustrate this interchangeability of hardware and
software, various illustrative components, blocks, modules,
circuits, and steps have been described above generally in terms of
their functionality. Whether such functionality is implemented as
hardware or software depends upon the particular application and
design constraints imposed on the overall system. Skilled artisans
may implement the described functionality in varying ways for each
particular application, but such implementation decisions should
not be interpreted as causing a departure from the scope of the
present disclosure.
[0084] In addition, the various illustrative logical blocks,
modules, and circuits described in connection with the aspects
disclosed herein may be implemented within or performed by an
integrated circuit ("IC"), an access terminal, or an access point.
The IC may comprise a general purpose processor, a digital signal
processor (DSP), an application specific integrated circuit (ASIC),
a field programmable gate array (FPGA) or other programmable logic
device, discrete gate or transistor logic, discrete hardware
components, electrical components, optical components, mechanical
components, or any combination thereof designed to perform the
functions described herein, and may execute codes or instructions
that reside within the IC, outside of the IC, or both. A general
purpose processor may be a microprocessor, but in the alternative,
the processor may be any conventional processor, controller,
microcontroller, or state machine. A processor may also be
implemented as a combination of computing devices, e.g., a
combination of a DSP and a microprocessor, a plurality of
microprocessors, one or more microprocessors in conjunction with a
DSP core, or any other such configuration.
[0085] It is understood that any specific order or hierarchy of
steps in any disclosed process is an example of a sample approach.
Based upon design preferences, it is understood that the specific
order or hierarchy of steps in the processes may be rearranged
while remaining within the scope of the present disclosure. The
accompanying method claims present elements of the various steps in
a sample order, and are not meant to be limited to the specific
order or hierarchy presented.
[0086] The steps of a method or algorithm described in connection
with the aspects disclosed herein may be embodied directly in
hardware, in a software module executed by a processor, or in a
combination of the two. A software module (e.g., including
executable instructions and related data) and other data may reside
in a data memory such as RAM memory, flash memory, ROM memory,
EPROM memory, EEPROM memory, registers, a hard disk, a removable
disk, a CD-ROM, or any other form of computer-readable storage
medium known in the art. A sample storage medium may be coupled to
a machine such as, for example, a computer/processor (which may be
referred to herein, for convenience, as a "processor") such the
processor can read information (e.g., code) from and write
information to the storage medium. A sample storage medium may be
integral to the processor. The processor and the storage medium may
reside in an ASIC. The ASIC may reside in user equipment. In the
alternative, the processor and the storage medium may reside as
discrete components in user equipment. Moreover, in some aspects
any suitable computer-program product may comprise a
computer-readable medium comprising codes relating to one or more
of the aspects of the disclosure. In some aspects a computer
program product may comprise packaging materials.
[0087] While the invention has been described in connection with
various aspects, it will be understood that the invention is
capable of further modifications. This application is intended to
cover any variations, uses or adaptation of the invention
following, in general, the principles of the invention, and
including such departures from the present disclosure as come
within the known and customary practice within the art to which the
invention pertains.
* * * * *